len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2026-01-22 01:30:35 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

imageviewer: jpegp: Fix downscaled image rendering

Browse source 
Fixed rendering issue when dimension is not divisible by downscale factor

Fixes FS#13719

Change-Id: I3b4ad035d5cce57acd3dc8a8e846bb5303598c8d
This commit is contained in:
Roman Artiukhin 2025-12-19 10:51:00 +02:00
parent eb49b82d33
commit c594b58af2
1 changed files with 4 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

13
apps/plugins/imageviewer/jpegp/jpegp.c
View file

@ -217,23 +217,18 @@ static int get_image(struct image_info *info, int frame, int ds)
int v2 = j->Vmax / j->Components[2].Vi;
int x, y;
for (y = 0; y < j->Y; y++)
int max_y = info->height * ds;
int max_x = info->width * ds;
for (y = 0; y < max_y; y += ds)
{
if (y%ds != 0)
continue;
TCOEF *C0 =
j->Components[0].du[j->Components[0].du_width * ((y / v0) / 8)] + 8 * ((y / v0) & 7);
TCOEF *C1 =
j->Components[1].du[j->Components[1].du_width * ((y / v1) / 8)] + 8 * ((y / v1) & 7);
TCOEF *C2 =
j->Components[2].du[j->Components[2].du_width * ((y / v2) / 8)] + 8 * ((y / v2) & 7);
for (x = 0; x < j->X; x++)
for (x = 0; x < max_x; x += ds)
{
if (x%ds != 0)
continue;
TCOEF c0 = C0[(x / h0 / 8) * 64 + ((x / h0) & 7)];
TCOEF c1 = C1[(x / h1 / 8) * 64 + ((x / h1) & 7)];
TCOEF c2 = C2[(x / h2 / 8) * 64 + ((x / h2) & 7)];